Hair clipper having a shiftable shear plate



Jan. 20, 1959 M. G. ANDIS HAIR CLIPPER HAVING A SHIFTABLE SHEAR PLATEFile d Aug. 26, 1957 INVEN TOR. M4 T'T'f/EW 6. 4x015 m, arm /Wm A rTOE/YE v5 Unite HAIR CLIPPER HAVING A SHIJFTABLE $H1EAR PLATE Matthew G.Andis, Racine, Wis, assignor to Andis Clipper Racine, Win, a corporationof Wisconsin Application August 26, 1957, Serial No. 68%,186

7 Claims. (Cl. 30-281) This invention relates to a hair clipper having ashear plate, means for adjusting the position of the plate and means foradjustably imposing frictional drag on the adjusting means.

In the device disclosed in my United States Patent 2,795,848, a shearplate is adjustable with respect to the heel of the clipper case andwith respect to the cutting blade with which the shear plate cooperatesin clipping hair. The device of the present invention includes means foradjustably imposing drag or friction on the carriage or guide piece onwhich the shear plate is mounted for movement.

In the preferred embodiment of the invention I provide a clamp bar forthe flange of a slideway which overhangs an exposed marginal portion ofthe shear plate carriage. The clamp bar is desirably actuated by a screwadjuster.

Other objects, features and advantages of the invention will appear fromthe following disclosure in which:

Figure 1 is a fragmentary side elevation, partly in section of a hairclipper embodying the device of the present invention, the section beingtaken along line 1-4 of Figure 3.

Figure 2 is an inverted plan view of a portion of the clipper with theshear plate, the cutting blade, etc. removed to expose details of theclaimed device.

Figure 3 is a cross section taken along the line 3-3 of Figure 1.

The hair clipper has a case 6 with a heavy heel plate 7 to which aslideway plate 8 is attached by means of the screws 9. The slidewayplate 8 has longitudinally extending marginal flanges 10 turned throughangles greater than 90 and which overhang marginally exposed beveledportions 11 of shear plate carriage or slide 12. The carriage isfastened by means of the bolts 13 to the shear plate 14.

Heel 7 is transversely bored at 17 and carries a rock shaft 18 having alaterally projecting peg 19 with a ball 20 engaged in a suitable socket21 in the carriage 12. Rocking motion imparted to the rock shaft 18 bymanipulation of its exposed handle 22 will cause reciprocation of theshear plate in the direction of elongation of the flanges 10.

In order to impose moderate frictional drag on the shear plate and toimpositively lock the shear plate in any position to which it isadjusted, I provide dual clamp bars 25 at each side of the clipper heel.The bars 25 have beveled sides 26 inclined substantially at the sameangle as the flanges 10 of the way plate 8. The clamp bars 25 functionas wedges under the pressure of adjusting screws 27 which are tappedinto suitable bores 28 in the heel 7. By applying tightening pressure tothe screws 27, the

States Patent 0 beveled sides 26 of the clamp bars 25 will tightenslideway flanges 10 against the underlying beveled margins 11 of thecarriage.

Ordinarily the screws 27 will be factory adjusted to im-- pose lightfrictional pressure on the carriage. Accordingly, the shear plate 14will be impositively held in any position to which it is moved bymanipulation of the handle 22. As the parts wear, however, it may benecessary to tighten the screws 27 to maintain the proper pressure onthe side flanges 10. Access to the screws 27 can be had simply byloosening the screws 13 and removing the shear plate 14 from itscarriage 12.

As is conventional, the clipper is also provided with a shear blade 29actuated from vibrator arm 30 through driving arm 31.

I claim:

1. The combination in a hair clipper having a shiftable shear plate, ofa carriage for the shear plate and a slideway along which the carriageis movable, means for adjustably imposing frictional drag between thecarriage and slideway, and means for overcoming said frictional drag forshifting said plate notwithstanding said drag.

2. The combination in a hair clipper having a shiftable shear plate, ofa carriage for the shear plate and a slideway along which the carriageis movable, and means for adjustably imposing frictional drag betweenthe carriage and slideway, said carriage being provided with a laterallyexposed margin and the slideway having a flange overhanging said margin,said means comprising a clamp to adjustably tighten said flange againstsaid margin.

3. The device of claim 2 in which the carriage margin and slidewayflange are correspondingly wedge-shaped in cross section, said clampcomprising another wedge engaged with the said flange.

4. The device of claim 3 in which the clamp wedge is provided with ascrew tightener.

5. In a hair clipper having a heel portion and a shear plate mounted formovement with respect to said heel portion, said heel portion beingprovided with a slideway plate having flanges elongated in the directionof movement of the shear blade, said shear blade being provided with acarriage plate having exposed margins embraced by said flanges wherebysaid shear plate is guided by said flanges in its movement, and meansfor tighten ing said flanges against the exposed margins of the carriageplate.

6. The device of claim 5 wherein the exposed margins of the carriageplate and the said flanges are correspondingly inclined, said tighteningmeans comprising wedges respectively engaged with the inclined flangesand means for clamping said wedges against said heel whereby toadjustably impose pressure on the flanges and against the embracedmargins of the carriage.

7. The device of claim 6 in which the means last mentioned comprisescrews threadably engaged with the heel.

References Cited in the file of this patent UNITED STATES PATENTS1,861,616 Wahl June 7, 1932 1,877,749 Andis Sept. 13, 1932 2,795,848Andis June 18, 1957 FOREIGN PATENTS 202,160 Australia June 9, 1955

